KNEMICERATID. 151 
A specimen in the Museum of Comparative Zoology is 50 mim. in 
diameter. This retained its flatter sides and proportionally broad venter to 
the end of the last volution. The living chamber is incomplete and 
somewhat less than half of a volution in length. A specimen from Abeih, 
Mount Lebanon, in the Museum of Comparative Zoology, 53 mm. in diam- 
eter, has a living chamber obviously very nearly complete and somewhat 
less than half a volution in length. This is therefore approximately the 
length of this part. One of the specimens in the Krantz collection in the 
Museum of Comparative Zoology shows thick shell on venter where it has 
been covered and protected by outer volution. Outside of this the cast is 
worn more or less, and there are absolutely no remnants of shell under the 
encrusting ostreans that occur on the exposed parts. The condition, in 
other words, proves that this and probably other fossils mentioned above 
were not living members of the Syrian fauna as heretofore described, but 
came from some earlier epoch and were already in the condition of fossil 
casts when the incrusting ostreans grew upon them. 
Locality: Gilead Mountains east of Jordan, Mount Lebanon, Syria. 
Age: Cenomanian. 
KNEMICERAS ATTENUATUM (Hyatt). 
Pl. XVI, figs. 13-15. 
Buchiceras attenuatum Hyatt, 1875, Proc. Boston Soe. Nat. Hist., Vol. XVII, p. 372. 
Glottoceras attenuatum Hyatt, ibid, note. 
The sutures agree quite closely with those of Knemiceras compressum, 
but the alternating tubercles on the edges of the venter and the form of 
this part are essentially Engonoceran. 
The original specimen is 65 mm. in diameter; it is a cast without any 
vestiges of the shell. The ventral lobe is deep and narrow and like that of 
Knemiceras The first lateral saddle is also Knemiceran in outline. It is 
unequally divided into three parts. The outer arm is trifid, but with such 
slight marginals that they are merely sinuosities. The central part is a 
minute saddle, and the inner has a trifid base. The second lateral is 
phylliform and so faintly bifid that I was not sure of the fact. All the 
remaining saddles are subphylliform, with broad bases and symmetrically 
bifid, except the seventh and eighth, the last on the line of involution. 
These are entire. The first to the sixth lobes are simple and denticulated; 
the seventh and eighth are entire. 
